latest on the health scare for vice president joe biden's son, beau. He is said to be in great shape and expected to be discharged today from a houston cancer hospital, after undergoing a procedure there earlier this week. Doctors don't know what's exactly wrong with beau biden. But he was admitted after becoming weak and disoriented last week. Abc's chief medical editor, dr. Richard besser, here with us this morning. Make it clear. You haven't seen the records here. You don't know exactly what is wrong. But first, treated for a stroke. And now, at a cancer center. What does it say to you? Initially, when you hear someone has similymptoms that are like a stroke and they've had a stroke in the past, you have to think whatever was going on before, it's happening now. But m.D. Anderson cancer center, it's one of the best in the world. It makes you think this has to be related to some type of a cancer. Could certain cancers cause a stroke? Well, if you have anything growing in your head, whether it's benign or cancerous, it causes pressure. And that pressure on your brain can cause symptoms that are exactly like what you would see in a stroke. Was age a factor here? He was awfully young to have suffered a stroke. When you hear confusion weakness, you have to take it seriously. Stroke can occur. About 70,000 people under 45 will have a stroke every, single year. They delay treatment because they think it only happens in the elderly. All of the things that cause the symptoms, you need to get them checked out right away. We don't know what's going on here. Hopefully it's nothing serious. He is set to be discharged. We wish him the best.

This transcript has been automatically generated and may not be 100% accurate.

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